Fig. 3.

Selection modeling in Rogue Chinook. Line graph representing the spring-run allele frequency over time under recessive, dominant, and codominant scenarios. Estimated spring-run allele frequencies in 1976 (1 y before LCD construction) and 2004 were used to determine selection coefficients for each scenario [recessive: s_FF = s_SF = 0, s_SS = 0.367; dominant: s_FF = 0, s_SF = s_SS = 0.646; codominant: s_FF = 0, s_SF = 1/2(s_SS), s_SS = 0.447]. The modeling assumes random mating and no genetic drift.